Spring MVC 文件上传-优快云博客

spring支持在网络应用程序处理文件上传，提供拔插的org.springframework.web.multipart.MultipartResolver对象　。

在写上传文件的前提下需提供两个jar包：

1.添加上传拦截，可指定上传的大小

   Java代码
    
  
 <!--上传拦截，如最大上传值及最小上传值--> 
 <beanid="multipartResolver" 
 class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 
 <!--oneofthepropertiesavailable;themaximumfilesizeinbytes--> 
 <propertyname="maxUploadSize"value="100000"/> 
 </bean> 

2.添加java后台处理的API

   Java代码
    
  
 @RequestMapping(value="/form",method=RequestMethod.POST) 
 publicStringhandleFormUpload(@RequestParam("name")Stringname, 
 @RequestParam("file")MultipartFilefile){ 
 if(!file.isEmpty()){ 
 byte[]bytes=file.getBytes(); 
 //去理上传写文件代码 
  
 } 

具体文件

spring_mvc.xml

   Xml代码
    
  
 <?xmlversion="1.0"encoding="UTF-8"?> 
 <beansxmlns="http://www.springframework.org/schema/beans" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:p="http://www.springframework.org/schema/p" 
 xmlns:context="http://www.springframework.org/schema/context" 
 xsi:schemaLocation=" 
 http://www.springframework.org/schema/beans 
 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
 http://www.springframework.org/schema/context 
 http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 
 <!--注解资源扫描包路径--> 
 <context:component-scanbase-package="org.spring.mvc"/> 
 <bean 
 class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/> 
  
 <bean 
 class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> 
  
 <!--对模型视图名称的解析，即在模型视图名称添加前后缀,在requestmapping输入的地址后自动调用该类进行视图解析--> 
 <beanid="viewResolver" 
 class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
 <propertyname="viewClass" 
 value="org.springframework.web.servlet.view.JstlView"/> 
 <propertyname="prefix"value="/"/><!--跳转页面的前缀路径如/web-inf/user/--> 
 <propertyname="suffix"value=".jsp"></property><!--跳转页面后缀如helloWorld.jsp--> 
 </bean> 
  
 <!--上传拦截，如最大上传值及最小上传值--> 
 <beanid="multipartResolver" 
 class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 
 <!--oneofthepropertiesavailable;themaximumfilesizeinbytes--> 
 <propertyname="maxUploadSize"value="100000"/> 
 </bean> 
  
 </beans> 

FileUploadController.java文件

   Java代码
    
  
 packageorg.spring.mvc.upload; 
  
 importjava.io.FileOutputStream; 
 importjava.io.IOException; 
 importjava.io.InputStream; 
 importjava.util.List; 
  
 importorg.slf4j.Logger; 
 importorg.slf4j.LoggerFactory; 
 importorg.spring.mvc.HelloWorldController; 
 importorg.springframework.stereotype.Controller; 
 importorg.springframework.web.bind.annotation.RequestMapping; 
 importorg.springframework.web.bind.annotation.RequestMethod; 
 importorg.springframework.web.bind.annotation.RequestParam; 
 importorg.springframework.web.multipart.MultipartFile; 
 importorg.springframework.web.multipart.MultipartHttpServletRequest; 
  
 /** 
 *上传文件 
 *@authorchenyw 
 * 
 */ 
 @Controller 
 @RequestMapping(value="/toFileUpload") 
 publicclassFileUploadController{ 
 privateLoggerlogger=LoggerFactory.getLogger(HelloWorldController.class); 
  
 /** 
 *单文件上传 
 *@paramname@RequestParam取得name字段的值 
 *@paramfile文件 
 *@return 
 *@throwsIOException 
 */ 
 @RequestMapping(value="/oneFileUpload",method=RequestMethod.POST) 
 publicStringhandleFormUpload(@RequestParam("name") 
 Stringname,@RequestParam("file") 
 MultipartFilefile)throwsIOException{ 
  
 logger.info("name："+name); 
 logger.info("上传文件："+file.getOriginalFilename()); 
 if(!file.isEmpty()){ 
 this.copyFile(file.getInputStream(),file.getOriginalFilename()); 
  
 } 
 return"fileUpload/success"; 
 } 
  
 /** 
 *多文件上传 
 *@paramrequest 
 *@paramname 
 *@return 
 *@throwsException 
 */ 
 @RequestMapping(value="/multipartFileUpload",method=RequestMethod.POST) 
 publicStringupload2( 
 MultipartHttpServletRequestrequest, 
 @RequestParam("name")Stringname//页面上的控件值 
 )throwsException{ 
 List<MultipartFile>files=request.getFiles("file"); 
 for(inti=0;i<files.size();i++){ 
 if(!files.get(i).isEmpty()){ 
 logger.info("上传文件："+files.get(i).getOriginalFilename()); 
 this.copyFile(files.get(i).getInputStream(),files.get(i).getOriginalFilename()); 
 } 
 } 
 logger.info("success"); 
 return"fileUpload/success"; 
 } 
  
 /** 
 *写文件到本地 
 *@paramin 
 *@paramfileName 
 *@throwsIOException 
 */ 
 privatevoidcopyFile(InputStreamin,StringfileName)throwsIOException{ 
 FileOutputStreamfs=newFileOutputStream("d:/upload/" 
 +fileName); 
 byte[]buffer=newbyte[1024*1024]; 
 intbytesum=0; 
 intbyteread=0; 
 while((byteread=in.read(buffer))!=-1){ 
 bytesum+=byteread; 
 fs.write(buffer,0,byteread); 
 fs.flush(); 
 } 
 fs.close(); 
 in.close(); 
 } 
  
  
 } 

单文件上传页面oneFileUpload.jsp

   Jsp代码
    
  
 <%@pagelanguage="java"import="java.util.*"pageEncoding="GBK"%> 
 <% 
 Stringpath=request.getContextPath(); 
 StringbasePath=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 
 %> 
  
 <!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN"> 
 <html> 
 <head> 
 <basehref="<%=basePath%>"> 
  
 <title>MyJSP'oneFileUpload.jsp'startingpage</title> 
  
 <metahttp-equiv="pragma"content="no-cache"> 
 <metahttp-equiv="cache-control"content="no-cache"> 
 <metahttp-equiv="expires"content="0"> 
 <metahttp-equiv="keywords"content="keyword1,keyword2,keyword3"> 
 <metahttp-equiv="description"content="Thisismypage"> 
 <!-- 
 <linkrel="stylesheet"type="text/css"href="styles.css"> 
 --> 
  
 </head> 
  
 <body> 
 ThisismyonefileUploadpage.<br> 
 <formmethod="POST"action="toFileUpload/oneFileUpload"enctype="multipart/form-data"> 
 <inputtype="text"name="name"/> 
 <inputtype="file"name="file"/> 
 <inputtype="submit"/> 
 </form> 
 </body> 
 </html> 

多文件上传页面multipartFileUpload.jsp

   Jsp代码
    
  
 <%@pagelanguage="java"import="java.util.*"pageEncoding="GBK"%> 
 <% 
 Stringpath=request.getContextPath(); 
 StringbasePath=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 
 %> 
  
 <!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN"> 
 <html> 
 <head> 
 <basehref="<%=basePath%>"> 
  
 <title>MyJSP'multipartFileUpload.jsp'startingpage</title> 
  
 <metahttp-equiv="pragma"content="no-cache"> 
 <metahttp-equiv="cache-control"content="no-cache"> 
 <metahttp-equiv="expires"content="0"> 
 <metahttp-equiv="keywords"content="keyword1,keyword2,keyword3"> 
 <metahttp-equiv="description"content="Thisismypage"> 
 <!-- 
 <linkrel="stylesheet"type="text/css"href="styles.css"> 
 --> 
  
 </head> 
  
 <body> 
 ThisismultipartFileUploadpage.<br> 
 <formmethod="POST"action="toFileUpload/multipartFileUpload"enctype="multipart/form-data"> 
 <inputtype="text"name="name"/><br> 
 <inputtype="file"name="file"/><br> 
 <inputtype="file"name="file"/><br> 
 <inputtype="submit"/><br> 
 </form> 
 </body> 
 </html>  

spring3 文件上传